Sparky,

I believe, if I understood correctly, it's based on the length of years diagnosed (28), not having a relapse for 11 years, no active lesions for a long time, lesions decreased in the c-spine and the brain MRI pretty much unchanged.

From what I know I have gone well beyond the time frame where most with MS would have already transitioned to SP. Yet, I don't seem to fit the RR part anymore with the absence of relapses (not complaining ).

I had never before heard of being SP without progression but I will take it.